You want to put an unprotected burn hazard in a bedroom? You hate your kids and want to burn the house down?

Besides being a terribly inrfficient way of heating.

I would check with your local building official to see exactly what will be allowed. He in the U.S. flues do run thru walls but there are minimum clearances that must be maintained in order to prevent a fire hazard. Having the flue exposed won't really provide much heat.

https://www.hearth.com/talk/threads/second-floor-chimney-enclosure-in-bedroom.173575/

Where I live the chimney cannot be enclosed and needs to be fully insulated where it is exposed so very little heat at all from the chimney. We have many homes in our area usung wood heat and they put a grate in the floor of the upper story to get some heat from the wood stove. Actaully wood heat here is being discouraged because of pollution . Is wood heat your best option in Scotland where you are?

Check local codes. Check manufacturer's installation instructions. Check your common sense. Check your fire insurance. Check all exits out of the bedroom/house.

I assume you mean centered 'on' one of the walls.

The flue will most likely get hotter than you think, or at least have the potential to. Some type of barrier would need to be constructed to assure no one or no thing would ever touch or come too close to the flue. Fire alarms may be in order and sleep lightly.

We did exactly that. wood burning stove in the room under a small bedroom. chimney went through the bedroom to the roof. not inside a wall, but two feet from the wall in the corner of the room. it was surrounded by a metal sleeve. the metal sleeve did get a bit hot to the touch, but the bedroom was primarily used in the summer, so it wasnt an issue.

We sold the house for full asking price, so it wasn't an issue in resale.

Yes, it was permitted and inspected. It can be done.

Here in the US a metal "flue" is a low-temperature vent for a gas appliance. For a wood burning stove the part above the stove is a "stovepipe" and the part that passes through an upper floor, attic and roof is a Class A high-temperature "chimney" typically with an internal temperature of 1,000 deg. but because it's double-walled and insulated it's unlikely to burn your skin.

However, in the US, metal chimneys must be tested and approved (usually by Underwriters Laboratories ... perhaps CE in the EU) and the recommendations from that test are made a part of the manufacturer's installation requirements enforcible by the local building official. I believe all metal chimneys for wood burning stoves are required by their manufacturers to be enclosed in living spaces. So, you need to get the installation instructions from the manufacturer.

IMO the best way to adapt the pipe for heating your bedroom is to enclose it (2" clearance to combustables) and install adjustable registers high and low in the enclosure.

You should also be aware that insulated chimney pipes typically have unsightly joints every 36" with floor and ceiling closure plates.

Selkirk (Metalbestos) invented the modern insulated stainless steel chimney more than 50 years ago. Their installation instructions require the chimney to be enclosed in a living space:

Thanks all - on reflection I think the best would probably be to go with an external flue (chimney), just designwise OR we might be able to put it in the corner of the room. Thanks again for taking the time to reply.

US Stove Vogelzang HR-6 Heat Reclaimer

It's a chilly part of north Scotland

You might try houzz.co.uk